Audio-embedded video frequency in audio-video mixed signal synchronous compression and method of extraction

• Main Author: HEXIN,ZHAO CHEN
• Format: Patent
• Language: English
• Published: 03.10.2007
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

This invention relates to signal imbedding and extracting technique and especially to audio and video mixture signal simultaneous compression, which comprises the following steps: 4í‡4 sub-block division step, digit audio signal imbedding video step, 4í‡4 sub block edge matching degree testing step and image data recovering step. The detail device comprises the following parts: 4í‡4 sub-block division unit, digit audio signal imbedding video unit, 4í‡4 sub block edge matching degree testing unit and image data recovering unit. The invention imbeds the audio frequency information bit into each gray frame 4í‡4 sub-block and uses the edge matching to test and extract nearly real audio data. íí